Electric fan on 1968 Roadrunner

I have a 68' 383 Roadrunner, manual trans. I want to reduce drag on the engine to free up some horsepower, so I've been thinking about converting from the stock fan to an electric fan. I just bought a 980 Cranking Amps red-top Optima battery.

Does anyone have suggestions on what brand/type of electric fan(s) I need to get, as well as an alternator (with the amperage rating) that would be strong enough to power the high compression 383, with electric fans and electric fuel pump (I might also be adding a stereo amp later in the future)?

It won't be that much power difference? How much do you think it would free up? I want to make it run more efficiently so I thought that might be a large step. Do you have any other ideas for making it more efficient? Do you have any recommendations on good (not for the rich) alternator brands/models? Thanks for the reply.

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